From 4c8fb2986d44c5a75949a88ac61deec0ed50a542 Mon Sep 17 00:00:00 2001 From: Gavi Teitz Date: Wed, 12 Dec 2018 21:23:18 +0200 Subject: [PATCH] net/mlx5e: Increase VF representors' SQ size to 128 The default size for the VF representors' SQ was too small to handle high packet rates. Doubling the size from 64 to 128 drastically improves the packet rate under stress (by about 50%), whereas increasing the size beyond 128 has not shown to make any further difference. The impact of the SQ size was measured with UDP traffic, in the following topology: TG <-> PF <-> TC forwarding <-> VF representor <-> VF in VM over a single core processing bi-directional traffic, with the following results: SQ size of 64: SQ size of 128: Packet rate for 64B UDP packets: 860 [Kpps] 1280 [Kpps] Packet rate for 114B VxLan encapsulated UDP packets: 320 [Kpps] 500 [Kpps] Signed-off-by: Gavi Teitz Reviewed-by: Or Gerlitz Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c index ed1158b58798..18d0f4f7537b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c @@ -45,8 +45,8 @@ #include "en/tc_tun.h" #include "fs_core.h" -#define MLX5E_REP_PARAMS_LOG_SQ_SIZE \ - max(0x6, MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE) +#define MLX5E_REP_PARAMS_DEF_LOG_SQ_SIZE \ + max(0x7, MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE) static const char mlx5e_rep_driver_name[] = "mlx5e_rep"; @@ -1336,7 +1336,7 @@ static void mlx5e_build_rep_params(struct net_device *netdev) if (rep->vport == FDB_UPLINK_VPORT) params->log_sq_size = MLX5E_PARAMS_DEFAULT_LOG_SQ_SIZE; else - params->log_sq_size = MLX5E_REP_PARAMS_LOG_SQ_SIZE; + params->log_sq_size = MLX5E_REP_PARAMS_DEF_LOG_SQ_SIZE;; /* RQ */ mlx5e_build_rq_params(mdev, params); -- 2.45.2